Tool point and its working method and tool for making and flangi

Details Tool point and its working method and tool for making and flangi Tool point and its working method and tool for making and flangi

1986-07-02

1988-01-19

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

With cutting of work or product

72126, 72325, B21D 1900

Patent

active

047197803

ABSTRACT:
The invention relates to a tool point as well as to a method and device for making a pipe joint flange in sheet material, like in the wall of a pipe. The tool point is provided with a hole-working bit member and a flanging surface is provided by the lower face of a recess thereabove or by the top surface of a chamfer. During the drilling of a hole, a certain axis of the hole-working means is brought to coincide with the axis of rotation of said tool point. When the hole working is finished, the tool point is shifted relative to the axis of rotation so as to move said axis of the hole-working means away from the axis of rotation, said flanging surface thus moving below the rim of a hole. When the tool point is then rotated in this radially displaced position while simultaneously pulling it out of the hole, the flanging surface pulls the hole rims upwards to form a flange. A single-component tool point is simple and sturdy and can, therefore, be used for flanging thick sheets.

REFERENCES:
patent: 3151657 (1964-10-01), Beranek
patent: 3670547 (1972-06-01), Granger
patent: 3683657 (1972-08-01), Davies
patent: 3812698 (1974-05-01), Stock
patent: 3844149 (1974-10-01), Hansen
patent: 3882707 (1975-05-01), Rothenberger

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